/* =============================================
   DESIGN TOKENS
   ============================================= */
:root {
  --midnight:   #0a0f1e;
  --slate:      #1c2333;
  --steel:      #2e3c52;
  --silver:     #8b9bb4;
  --white:      #f0f4f8;
  --signal:     #00b4d8;
  --signal-dim: #0077a8;
  --warm-white: #e8edf4;
  --rule:       rgba(255,255,255,0.07);

  --font-display: 'Inter', system-ui, -apple-system, sans-serif;
  --font-body:    'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --font-mono:    'IBM Plex Mono', 'Menlo', 'Courier New', monospace;

  --h1:   clamp(2.5rem, 5vw, 4.5rem);
  --h2:   clamp(1.75rem, 3vw, 2.75rem);
  --h3:   clamp(1.05rem, 1.8vw, 1.3rem);
  --body: clamp(0.9rem, 1.15vw, 1rem);
  --sm:   clamp(0.75rem, 0.95vw, 0.85rem);

  --nav-h: 64px;
  --sec-y: clamp(4.5rem, 9vw, 8rem);
  --max-w: 1280px;
  --gap:   clamp(1.5rem, 4vw, 3rem);
}

/* =============================================
   RESET & BASE
   ============================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  background: var(--midnight);
  color: var(--white);
  font-family: var(--font-body);
  font-size: var(--body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { display: block; max-width: 100%; height: auto; }

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
  border-radius: 2px;
}

/* =============================================
   UTILITIES
   ============================================= */
.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gap);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--sm);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--signal);
  margin-bottom: 1rem;
  display: block;
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* =============================================
   BUTTONS
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65em 1.5em;
  border-radius: 3px;
  font-family: var(--font-body);
  font-size: var(--sm);
  font-weight: 600;
  letter-spacing: 0.025em;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
  border: 1.5px solid transparent;
  white-space: nowrap;
}
.btn-filled {
  background: var(--signal);
  color: #ffffff;
  border-color: var(--signal);
}
.btn-filled:hover, .btn-filled:focus-visible {
  background: #009dbf;
  border-color: #009dbf;
}
.btn-outline {
  background: transparent;
  color: var(--signal);
  border-color: var(--signal);
}
.btn-outline:hover, .btn-outline:focus-visible {
  background: rgba(0,180,216,0.08);
}
.btn-lg {
  padding: 0.85em 2em;
  font-size: 0.9rem;
}

/* =============================================
   NAVIGATION
   ============================================= */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  background: rgba(10,15,30,0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--rule);
  z-index: 200;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-brand {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--warm-white);
}
.nav-brand span { color: var(--signal); }
.nav-menu {
  display: flex;
  align-items: center;
  gap: clamp(1.5rem, 2.5vw, 2.5rem);
}
.nav-menu a {
  font-size: var(--sm);
  font-weight: 500;
  color: var(--white);
  letter-spacing: 0.02em;
  transition: color 0.15s;
}
.nav-menu a:hover { color: var(--signal); }

.nav-burger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--warm-white);
}
.nav-burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s, opacity 0.2s;
  margin: 5px 0;
}
.nav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 767px) {
  .nav-burger { display: block; }
  .nav-menu {
    display: none;
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    background: var(--slate);
    border-bottom: 1px solid var(--rule);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem var(--gap) 2rem;
    gap: 1.25rem;
  }
  .nav-menu.is-open { display: flex; }
  .nav-menu .btn { width: 100%; justify-content: center; }
}

/* =============================================
   HERO
   ============================================= */
.hero {
  background: var(--midnight);
  padding-top: var(--nav-h);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 70% 30%, rgba(0,180,216,0.05) 0%, transparent 55%),
    radial-gradient(circle at 20% 80%, rgba(0,119,168,0.04) 0%, transparent 45%);
  pointer-events: none;
}

/* Dot grid texture */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  opacity: 0.5;
}

.hero-body {
  position: relative;
  z-index: 1;
  padding: clamp(4rem, 9vw, 7rem) 0 clamp(3rem, 6vw, 5rem);
}

.hero-mark {
  margin-bottom: 2rem;
}

.hero-headline {
  font-family: var(--font-display);
  font-size: var(--h1);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.04;
  color: var(--warm-white);
  margin-bottom: 1.5rem;
  max-width: 18ch;
}
.hero-headline em {
  font-style: normal;
  color: var(--signal);
}

.hero-sub {
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: var(--silver);
  max-width: 54ch;
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--rule);
}
.stat-num {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--warm-white);
  line-height: 1;
  display: block;
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--silver);
  display: block;
  margin-top: 0.35rem;
}

/* Evidence Rail */
.rail {
  position: relative;
  z-index: 1;
  background: var(--slate);
  border-top: 1px solid var(--rule);
  overflow: hidden;
  padding: 0.875rem 0;
}
.rail-track {
  display: flex;
  gap: clamp(3rem, 5vw, 5rem);
  width: max-content;
  animation: rail-scroll 60s linear infinite;
}
.rail-track:hover { animation-play-state: paused; }
@keyframes rail-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
.rail-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--silver);
  letter-spacing: 0.04em;
}
.rail-item::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--signal);
  flex-shrink: 0;
}

/* =============================================
   SECTION SHARED STYLES
   ============================================= */
.sec { padding: var(--sec-y) 0; }
.sec-dark  { background: var(--midnight); }
.sec-mid   { background: var(--slate); }

.sec-hdr { margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.sec-hdr h2 {
  font-family: var(--font-display);
  font-size: var(--h2);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.08;
  color: var(--warm-white);
}
.sec-hdr p {
  margin-top: 0.85rem;
  color: var(--silver);
  max-width: 58ch;
  line-height: 1.65;
}

/* =============================================
   EXPERTISE GRID
   ============================================= */
.expertise-grid {
  display: grid;
  grid-template-columns: 1fr;
  background: var(--rule);
  gap: 1px;
  border: 1px solid var(--rule);
}
@media (min-width: 640px)  { .expertise-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .expertise-grid { grid-template-columns: repeat(3, 1fr); } }

.exp-card {
  background: var(--midnight);
  padding: clamp(1.75rem, 3vw, 2.5rem);
  transition: background 0.2s;
}
.exp-card:hover { background: #0d1527; }

.exp-icon {
  width: 42px;
  height: 42px;
  margin-bottom: 1.25rem;
  flex-shrink: 0;
}
.exp-title {
  font-family: var(--font-display);
  font-size: var(--h3);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--warm-white);
  margin-bottom: 0.6rem;
  line-height: 1.25;
}
.exp-desc {
  font-size: 0.875rem;
  color: var(--silver);
  line-height: 1.65;
  margin-bottom: 1rem;
}
.exp-stat {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--signal);
  letter-spacing: 0.04em;
}

/* =============================================
   TIMELINE
   ============================================= */
.timeline {
  border-left: 1px solid var(--steel);
  padding-left: 2rem;
  position: relative;
}

.timeline-item {
  position: relative;
  padding-bottom: 2.25rem;
}
.timeline-item:last-child { padding-bottom: 0; }

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-2rem - 5px);
  top: 0.35rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--steel);
  background: var(--slate);
  transition: border-color 0.2s, background 0.2s;
}
.timeline-item:hover::before { border-color: var(--signal); background: var(--signal); }
.timeline-item:first-child::before { border-color: var(--signal); background: var(--signal); }

.tl-years {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--signal);
  letter-spacing: 0.08em;
  margin-bottom: 0.3rem;
}
.tl-company {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--warm-white);
  letter-spacing: -0.015em;
}
.tl-via {
  font-weight: 400;
  font-family: var(--font-body);
  color: var(--silver);
  font-size: 0.875rem;
  margin-left: 0.3rem;
}
.tl-role {
  font-size: 0.875rem;
  color: var(--silver);
  margin-top: 0.1rem;
}
.tl-impact {
  font-size: 0.875rem;
  color: var(--white);
  opacity: 0.65;
  margin-top: 0.5rem;
  max-width: 70ch;
}

/* =============================================
   CLIENT LOGOS
   ============================================= */
.clients-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
  padding: 1rem 0;
}
.client-logo {
  height: clamp(28px, 3.5vw, 44px);
  width: auto;
  filter: brightness(0) invert(1);
  opacity: 0.5;
  transition: opacity 0.25s;
}
.client-logo:hover { opacity: 0.9; }

/* =============================================
   PROGRAM CARDS
   ============================================= */
.programs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 768px)  { .programs-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1100px) { .programs-grid { grid-template-columns: repeat(3, 1fr); } }

.prog-card {
  background: var(--midnight);
  border: 1px solid var(--steel);
  padding: clamp(1.5rem, 2.5vw, 2.25rem);
  transition: border-color 0.2s;
  display: flex;
  flex-direction: column;
}
.prog-card:hover { border-color: var(--signal); }
.prog-org {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  color: var(--signal);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.85rem;
}
.prog-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  letter-spacing: -0.02em;
  color: var(--warm-white);
  line-height: 1.25;
  margin-bottom: 0.75rem;
}
.prog-outcome {
  font-size: 0.875rem;
  color: var(--silver);
  line-height: 1.65;
  flex: 1;
  margin-bottom: 1.25rem;
}
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
}
.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--silver);
  background: var(--slate);
  border: 1px solid var(--steel);
  padding: 0.2em 0.65em;
  letter-spacing: 0.04em;
  border-radius: 2px;
}

/* =============================================
   CONTACT
   ============================================= */
.contact-body {
  max-width: 660px;
}
.contact-avail {
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  color: var(--silver);
  margin-bottom: 2.5rem;
  line-height: 1.7;
}
.contact-avail strong { color: var(--warm-white); font-weight: 600; }
.contact-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
  background: var(--slate);
  border-top: 1px solid var(--rule);
  padding: 1.75rem 0;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}
.footer-id {
  font-size: 0.875rem;
  color: var(--silver);
}
.footer-id strong { color: var(--warm-white); }
.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--steel);
  letter-spacing: 0.04em;
}